How fast did dinosaurs really go? Birds walking in mud provide new clues
Over a video call from a dig site near Oxford, England, Peter Falkingham points his phone down to show a fossilized footprint of what was probably a large sauropod. Stepping inside the long-necked dinosaur print, which could fit both of his feet multiple times, he explains that these marks are parts of trackways: millions-of-years-old footprints…
